Add 3/10 and 42/40, Solve 3/10 + 1 2/40 as a fraction

Add 3/10 and 42/40

1^st number: 3/10, 2^nd number: 1 2/40

3/10 + 42/40 is 27/20.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40

Next, find the equivalent fraction of both fractional numbers with denominator 40
For the 1st fraction, since 10 × 4 = 40,
3/10 = 3 × 4/10 × 4 = 12/40
Likewise, for the 2nd fraction, since 40 × 1 = 40,
42/40 = 42 × 1/40 × 1 = 42/40
Add the two like fractions:
12/40 + 42/40 = 12 + 42/40 = 54/40
54/40 simplified gives 27/20
So, 3/10 + 42/40 = 27/20
In mixed form: 17/20

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